Your first OSGi bundle

The following will create a simple OSGi bundle and run it within Eclipse. At the end of this chapter you will also export your bundle to use it later in a standalone OSGi server.

4.1. Create

Create a new plugin project "de.vogella.osgi.firstbundle".

4.2. Coding

Create the following thread class.

    
package de.vogella.osgi.firstbundle.internal;

public class MyThread extends Thread {
 private volatile boolean active = true;

 public void run() {
  while (active) {
   System.out.println("Hello OSGI console");
   try {
    Thread.sleep(5000);
   } catch (Exception e) {
    System.out.println("Thread interrupted " + e.getMessage());
   }
  }
 }

 public void stopThread() {
  active = false;
 }
}

   

Change the class Activator.java to the following.

    
package de.vogella.osgi.firstbundle;

import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;

import de.vogella.osgi.firstbundle.internal.MyThread;

public class Activator implements BundleActivator {
 private MyThread myThread;

 public void start(BundleContext context) throws Exception {
  System.out.println("Starting de.vogella.osgi.firstbundle");
  myThread = new MyThread();
  myThread.start();
 }

 
 public void stop(BundleContext context) throws Exception {
  System.out.println("Stopping de.vogella.osgi.firstbundle");
  myThread.stopThread();
  myThread.join();
 }

}

   

4.3. Run

Select your manifest.mf, right-click, select Run As-> Run Configuration. Create a OSGi Framework launch configuration. Deselect all bundles except your de.vogella.osgi.firstbundle. Press then "Add Required bundles".

Run this configuration. This should give you the following output. Every 5 second a new message should be written to the console.

4.4. Export your bundle

Export your bundle. This will allow you to install it into a OSGi runtime. Select your bundle and choose File -> Export -> Plug-in Development -> "Deployable plug-ins and fragment".

Unflag the option to export the source.